Our only find of this atc90 was this bike that was on its way to the dump, Honda started production of the US90 in 1969 with ser# starting at 100122, Our ser# is 100020? Could it be the James Bond Gold finger Bike? Could it be one of the prototypes? Could this be bike number 20? and just maybe the only one of its kind in the world? More to come as our hunt gos, maybe?